i've problem with smtp port thats cannot listening, how to fix this problem?

if you are using Mail Server plugin, you can try to restart it. it usually helps

aaP_aapanel15 is this services?

yes, restart them to see wheter it helps

aaP_aapanel15 i've tried but its not work, and still not listening

aaP_riza_robby Hello, use the SSH tool to see if port 25 is used: netstat -tulnp|grep 25 lsof -i:25 try restarting postfix /etc/init.d/postfix restart

aaPanel_Kern after this command i check to panel and still not listening

aaP_riza_robby Hello, ubuntu/debian needs root privileges to restart the service sudo /etc/init.d/postfix restart Also check the log of the mail server for errors

fix this problem, following this tutorial from https://askubuntu.com/questions/932557/how-to-listen-new-port-ubuntu-server-from-command-line most easiest way, in my opinion, is to create systemd unit. For this purpose: Create /etc/systemd/system/listen-3000.service: sudo nano /etc/systemd/system/listen-3000.service As content of /etc/systemd/system/listen-3000.service place: [Unit] Description=Permanent listen at :::3000 After=network-online.target [Service] User=root ExecStart=/usr/bin/nc -l6 3000 ExecStop=/usr/bin/killall -s KILL nc Restart=always RestartSec=1 [Install] WantedBy=multi-user.target Enable and start the listen-3000.service: sudo systemctl daemon-reload sudo systemctl enable listen-3000.service sudo systemctl start listen-3000.service sudo systemctl status listen-3000.service Disable and stop the listen-3000.service: sudo systemctl stop listen-3000.service sudo systemctl disable listen-3000.service

aaP_riza_robby in a several minutes, the port might not listening again, its such like limitation after i tried to ping this port anymore. how to fix this limit?

sudo /etc/init.d/postfix restart Also check the log of the mail server for errors

How to change status from not listening to listening port on firewall

aaPanel_Kern

aaP_riza_robby
Hi, I have received it. Now I see that port 25 is Listening

aaPanel_Kern

aaP_riza_robby
Hi, see now, Not Listening
Where have you been logged in?

Jul 5 10:59:23 kepalariza dovecot: pop3-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS handshaking: Connection closed, session=<VkK44AbjwKd/AAAB>

aaP_riza_robby

aaPanel_Kern
yes those port are not listening again, how to fix this problem?
could you help to set it up for mail server configuration from our panel?